The Yealink EXP40 (YEA-EXP40)
expansion module features a 160×320 Graphic LCD and 20 physical
keys each with a dual-color LED. By programming the keys, you can set the keys for speed dial or BLF
functionality. In addition, a “page switch” allows you to change screens and have up to 40 programmable keys.
The new design of EXP40 stand with two adjustable angles ,allows device to be mounted to wall and eliminates the need for external light using backlit display.
With power supply up to 6 expansion Modules it can be used with one SIP-T46 and adds up to 240 additional buttons.